I've been using Bullseye glass since 2013, this is my first forum post question. I'm having an issue with vitrigraph. I am using the vitrigraph as shapes to create abstract designs, and in the initial full fuse of the vitrigraph to the glass sheet I am ending up with small bubble/craters in some places - usually at a place where the vitrigraph stringer is fatter than the stringer before or after that place. The size of these bubbles/craters range from 1 to 3 mm (sometimes they are bubbles and sometimes they are collapsed craters. My guess is that there is air trapped in the stringer at this place and it can't escape. I've adjusted the time for the bubble soak stage from my normal fuse schedule, but I'm still receiving the same result. My most recent adjusted schedule is: 300/1100/0 - 150/1240/60 - 400/1440/10 - AFAP/960/60 - 150/700/0. The kiln is Evenheat GTS 2541-13. I have been fusing two vitrigraph stringers, Red Tomato and Black, on separate glass projects and am having the same bubble/crater issue with both. Assistance with this issue is appreciated.